customarily

"He is a student of life."

"The divers encountered a huge school of mackerel."

"The school's student handbook is our customary guide for behavior during lunch break. "

"The morning classes at school begin at 8:00 a.m. "

"The frequency of bus service has been improved from one every 15 to one every 12 minutes."

""Because of unforeseen circumstances, the school trip was cancelled." "

"The carpenter used a T-square to draw a normal to the edge of the wooden board. "

"Their family's custom was to have dinner together every evening. "

"He arrived home for two days."

"My sister learned to write in a very careful manner. "

"The teacher promptly returned the graded papers, so the students could see their scores. "

"My brother normally gets up early for school. "